DEVELOPMENT OF A CENTRAL SENSOR PLAUSIBILITY CHECKFOR THE VEHICLE MOVEMENT

摘要

In recent years an increasing number of electronic systems in modernpassenger vehicles can be observed. Especially, systems sensing and influencing the vehiclemotion (e.g. GPS based navigation and ABS, ESP respectively) are rather popular. Thevariety of sensors included in each of these systems offers the possibility of sensor fusionwith a potential use of the retrieved information for other systems in the vehicle.Additionally, direct or analytical sensor redundancy can be used in order to perform aplausibility check of the sensor information. This feature will become crucial especially foremployment of sensor information in safety critical applications.A first realization of such a system will only consider unidirectional usage of fused sensorinformation, I.e. the information supplying vehicle systems will rely on plausibility checks ofthe proposed system but not on fused information, which, for example, can be estimated bymeans of vehicle models. However, for future realizations, one focus of sensor fusion will beto use fused information in order to cut down on sensors and thus to save costs.A main feature of a central sensor plausibility check is an improvement of fault detection:with additional sensor information the sensitivity of fault detecting algorithms can beimproved. Furthermore, the concentration of plausibility check and estimation of nonmeasuredphysical information in one system will reduce the overall effort on software andwill facilitate the realization of new functions. An important requirement for such a system isa simple development- and application process. The system should be scalable in the sensethat new sensors easily can be integrated in the proposed concept.Introduction of a central sensor plausibility check will be a gradual process. One possibleintroduction scenario is presented. Nevertheless, the final architecture of a central sensorfusion is still open. Some open problems will be discussed at the end of the paper.